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resoto/README.md

Resoto — Software engineer in Japan. iOS apps, blockchain, and security.

I build iOS apps for the outdoors and everyday life, and explore blockchain, decentralized infrastructure, and security.
Swift enthusiast, mountain climber, and rubber duck lover.

About · Apps · Open source · Skills · Certifications · Contact

What drives me

My interests in hiking and technology come together in the apps I build. I enjoy creating easy-to-use tools that solve small problems, whether on a mountain trail or in everyday life.

I’m also interested in distributed systems and large-scale networks. I created BCASim to simulate attacks on blockchain networks.

Selected apps

A few of the iOS apps I design and develop. Explore all apps at Resoto Apps →

WordTrail app icon

WordTrail

English learning

Turn English articles into study material with on-device AI explanations, quizzes, and vocabulary review.

View on the App Store ↗

Hiking Tools app icon

Hiking Tools
山のツール

Hiking & outdoors

An altimeter, compass, GPS recording, and bear bell in a customizable toolkit for the trail.

View on the App Store ↗

IP Checker app icon

IP Checker
IPチェッカー

Network utilities

Check public IPv4/IPv6, VPN status, and ISP details, with connection history and shareable reports.

View on the App Store ↗

ScanList app icon

ScanList

Scanning & productivity

Scan QR codes and barcodes in batches, organize records, and export to Excel, CSV, or JSON.

View on the App Store ↗

Open source

BCASim · Blockchain Attack Simulator

BCASim logo

An open-source blockchain simulator for attack analysis. Customize node behavior and protocol rules to explore double spending, selfish mining, and Sybil attacks.

Explore the repository →

See the network simulation
Animated BCASim blockchain network simulation

Skills & interests

Swift Java C Cloudflare Linux Blockchain Hyperledger

Certifications

AWS Certified Cloud Practitioner AWS Certified Solutions Architect – Associate Microsoft Certified Azure Fundamentals JDLA Deep Learning for GENERAL

Contributions

Animated GitHub contribution grid

Resoto Apps · Email me

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